[Investigation of microbial contamination of the air and equipment of a biological waste water purification station].

The paper describes the results of a study of ambient air microbiological pollution in the working premises and equipment surfaces in the main shops of the biological waste water purification station of a cardboard-polygraphic plant. The findings suggest that there is high microbial contamination of the working environment, which should be born in mind on developing measures to optimize working conditions and on studying morbidity rates among the workers.

[Hygienic assessment of a biological factor at a garbage-processing enterprise].

The study of a biological factor at solid domestic waste-processing enterprises has established that air and the surface of technological equipment are highly contaminated with bacteria and molds.

[Municipal sewage treatment plants as sources of environmental air pollution]. / Sooruzheniia po ochistke gorodskikh kanalizatsionnykh stokov kak istochniki zagriazneniia atmosfernogo vozdukha.

Municipal sewage works as sources of ambient air pollution were studied. Mechanical cleaning catch frames, primary settlers, aero-tanks, and sludge sites are the major air pollution sources. The most important air pollutants are ammonia and hydrogen sulfide. Their concentrations above the permissible concentrations were registered at distances of 300-500 and as far as 500 mm from the aeration stations and sludge sites, respectively.